#include<cstdio>
#include<queue>
using namespace std;

int main(){
	queue<int> q;
	q.push(3);
	q.push(2);
	q.push(5);
	int x = q.front();
	q.pop();
	int y = q.front();
	printf("x=%d y=%d\n", x, y);
	return 0;
}
